Obstruction of the Central Retinal Vein.

The author, in his graduation thesis for the University of Buenos Aires, reviews the anatomy, histopathology and history of clinical observation on obstruction of the central retinal vein and reports his findings in 4 cases. The illustrations are chiefly photographs of fundus conditions, and there is a bibliography. Various theories of pathogenesis are reviewed. While arteriosclerosis seems to be the most common factor, the condition is due in a certain number of cases to syphilis and in others to inflammation in or about the vein resulting from foci of infection in the teeth, in the tonsils or elsewhere. Of the author's 4 cases, arteriosclerosis with hypertension was present in 3, while in the other syphilis was considered probable, the patient being 38 years of age, with a positive Kahn reaction. This was the only case in which considerable improvement occurred, vision returning to ⅔ after three months. Secondary glaucoma occurred